diff --git a/.gitignore b/.gitignore
index 8c5a14524c..913502b964 100644
--- a/.gitignore
+++ b/.gitignore
@@ -69,15 +69,20 @@
 /resources/**/*.INP
 /resources/**/*.OUT*
 /testing
+/third_party/BUILD.gn
+/third_party/WebKit
 /third_party/WebKit/Tools/Scripts
+/third_party/accessibility_test_framework
+/third_party/afl
 /third_party/android_platform
 /third_party/android_tools
+/third_party/apache_velocity
 /third_party/appurify-python
 /third_party/asan
 /third_party/ashmem
 /third_party/binutils
 /third_party/boringssl
-/third_party/BUILD.gn
+/third_party/bouncycastle
 /third_party/catapult
 /third_party/clang_format
 /third_party/class-dump
@@ -90,17 +95,21 @@
 /third_party/gaeunit
 /third_party/gflags/src
 /third_party/google-visualization-python
+/third_party/guava
+/third_party/hamcrest
 /third_party/icu
-/third_party/instrumented_libraries
+/third_party/icu4j
 /third_party/ijar
+/third_party/instrumented_libraries
+/third_party/intellij
 /third_party/jsoncpp
 /third_party/jsr-305
 /third_party/junit
 /third_party/junit-jar
+/third_party/libFuzzer
 /third_party/libc++
 /third_party/libc++-static
 /third_party/libc++abi
-/third_party/libFuzzer
 /third_party/libjingle
 /third_party/libjpeg
 /third_party/libjpeg_turbo
@@ -119,16 +128,17 @@
 /third_party/openh264
 /third_party/openmax_dl
 /third_party/opus
+/third_party/ow2_asm
 /third_party/proguard
 /third_party/protobuf
 /third_party/requests
 /third_party/robolectric
 /third_party/sqlite
+/third_party/sqlite4java
 /third_party/syzygy
 /third_party/tcmalloc
 /third_party/usrsctp
 /third_party/valgrind
-/third_party/WebKit
 /third_party/winsdk_samples/src
 /third_party/yasm
 /third_party/zlib